I'm pretty sure theres an option to do that in Starcraft of you can do the online play and just find each other.
You just go to Multiplayer. Then Battle.net. Then click the best server. Either add your friend by typing */f a *name* and message him with */f m *name* or whisper him with */w *name*. Without the stars of course.
This all depends on what kind of StarCraft you have: A.) Do you have a crack StarCraft? If so, move onto option one. B.) Did you purchase the real StarCraft? If so, move onto option two. 1.) If you have a cracked StarCraft you have to have the same version as your cousin. Once that is solved, download the program Hamachi and create a room. After that, make your cousin join the room and you should be set. The only thing left is for you to create a game in LOCAL AREA not Battle Net! Here is the Hamachi download link. http://www.filehippo.com/download_hamachi/?1840 2.) If you purchased StarCraft then this option will be easier. All you have to do is make a room in Battle Net and play with him. Good luck and have fun! :lol: